62TE P0716: Input Speed Sensor Performance Causes & Fix

P0716 gets misread constantly, and the misreading costs a sensor and a couple of hours. It is not a wiring code. ATRA's 62TE code list spells it out as Input Speed Sensor 1 Circuit Performance, and performance is the operative word. The signal is there. The controller just does not believe it.

That distinction decides your whole approach. An open or shorted input speed sensor circuit sets a circuit code and you go looking for a broken wire. A performance code means the sensor reported a number that failed a plausibility check against everything else the module knows: engine speed, the other two speed sensors, the gear it commanded, and the converter clutch state. Sometimes the sensor is lying. Just as often, the sensor is the only honest part in the story.

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The 62TE Watches Speed in Two Stages

Most transaxles hand the controller an input and an output and let it do one piece of division. The 62TE does not, and this is what trips up techs coming to it from a 41TE.

Per ATRA, this unit carries three speed sensors, and they are not redundant:

• ISS, input speed sensor. Relocated to the top of the case. Like the 41TE, it reads turbine speed off the input shaft. This is the sensor P0716 is about.
• TSS, transfer speed sensor. This is the old 40/41TE output speed sensor, moved to the rear of the case and renamed. It reads rotation of the front annulus and rear carrier assembly, which is the output of the original four-speed centerline.
• OSS, output speed sensor. Also at the rear of the case, and unique to the 62TE. It reads the underdrive compounder output carrier, which is the real output of the transaxle.

So the ratio math splits in half. ISS divided by TSS gives you the ratio the 41TE-style main box is actually producing. TSS divided by OSS gives you what the underdrive compounder behind it is doing. The controller checks both, which is why this unit carries ordinary gear ratio codes (P0731 through P0736, plus P0729 for sixth) and also a dedicated P0792, compounder speed ratio error.

Once you see the math that way, P0716 stops being mysterious. The module flagged the front half of the equation. Either the ISS number itself is garbage, or the ISS number is fine and something downstream made it look wrong.

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What the Vehicle Does When It Sets

Know the failure response before the customer describes it, because the description tells you when the fault occurred. ATRA's 62TE material lays out the pattern for the ratio and pressure switch fault chain: the solenoid circuits get retested whenever a gear ratio or pressure switch error occurs, one failure sets the DTC and lights the MIL, and then speed matters. If the fault sets above 35 km/h, about 22 mph, the transmission goes to neutral. Below that, it drops into limp-in.

A customer who says the van coasted with the engine still running at highway speed is describing the neutral response. A customer who says it quit shifting pulling out of a parking lot is describing limp-in. Same underlying fault, two very different stories, and the difference tells you what speed to duplicate it at.

There is a milder behavior on this transaxle worth recognizing so you do not chase it. When a pressure switch set condition is identified, first gear and converter lockup are inhibited, the vehicle launches in second and shifts normally through the gears without lockup, and if the condition is no longer valid during that same key start it returns to normal operation. A complaint of a soft, slow launch that fixes itself after a restart is that behavior, not a failing ISS.

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Diagnosis: Five Checks, In Order

1. Fluid level and condition, before anything else

This is not filler advice on a 62TE, it is a documented factory fix. FCA bulletin 21-046-15, dated July 14, 2015, covers 2015 Grand Caravan and Town and Country units with the 62TE (sales code DG2) where the entire complaint of harsh shifting under heavy acceleration turned out to be an under-filled transmission. The published repair was to check the level and correct it. Nothing else.

Low fluid aerates the pump feed, line pressure falls off, clutches release under load, and the ratio math goes sideways. That is a speed sensor rationality code with a perfectly good sensor bolted in the case. Use ATF+4 to Chrysler material standard MS-9602. Per ATRA, a service fill is 5.5 quarts (5.2 L) and a fill after an internal repair is 9.0 quarts (8.5 L). Check it on level ground with the transmission temperature verified on the scan tool, using Miller tool 9336 or an equivalent wire stick, since most of these have no conventional dipstick.

2. Graph all three speed sensors against engine RPM

This is the check that actually finds the fault, and it takes one road test. Put ISS, TSS, OSS and engine RPM on the same graph, add transmission temperature and the converter clutch state, then drive the complaint.

What you are looking for:

• ISS dropping to zero or spiking while the vehicle is clearly moving. A momentary drop to zero with TSS and OSS still tracking is the sensor or its circuit, full stop. Nothing mechanical makes the input shaft stop and restart in 40 milliseconds.
• ISS reading high relative to TSS. The input is turning faster than the main box output can account for. That is slip in the front half, and the sensor is telling the truth.
• ISS not matching engine RPM with the converter clutch applied. With the TCC locked there is no fluid coupling left to hide behind, so those two traces should sit nearly on top of each other. A gap there is real.
• Noise on more than one trace at once. If ISS and TSS both go ratty in the same instant, you are not looking at two failed sensors. You are looking at a shared ground or shield problem, which is exactly what P1794, speed sensor ground error, exists to describe on this unit.

3. Read every stored code, then read the company P0716 keeps

P0716 by itself is a different problem than P0716 with friends. Sort it like this:

• P0716 alone, with clean CVIs. Sensor, connector, or ground. Electrical work.
• P0716 with P0721 or P0791. More than one speed sensor is being questioned. Suspect the shared circuit before you suspect three sensors, and look for P1794.
• P0716 with P0731 through P0736, or P0729. The ratio errors are the real story. Something is slipping and the sensors are reporting it accurately.
• P0716 with P0792. The compounder ratio is off too. That points at the underdrive compounder behind the main box, not at a sensor on top of the case.
• P0716 with P1790, fault immediately after shift. The rationality window is being missed during the shift event itself, which pulls apply timing and clutch fill into the picture.

4. Pull the CVIs and compare them to spec

Clutch volume index is the cheapest slip test on this transaxle and it costs nothing but scan tool time. ATRA explains the mechanism plainly: the TCM derives CVIs by monitoring how long the gear ratio takes to change after a shift request, using the input and output speed sensor values. As friction material wears, the volume of fluid needed to apply the element rises.

The published 62TE clutch volume ranges are:

• UD: 26 to 74
• 2/4: 16 to 54
• OD: 42 to 143
• L/R: 16 to 63
• LC, low clutch: 16 to 25
• DC, direct clutch: 26 to 34

Notice how tight the LC and DC windows are next to the rest. Those two live in the underdrive compounder, and a compounder clutch that has started to pass shows up out of range long before the driver complains. Two practical cautions: most clutch volumes only update above 43 C (110 F) transmission oil temperature, so a cold read is a meaningless read, and a value that has not updated recently is stale rather than good.

CVIs inside spec with P0716 stored pushes you back toward the electrical side. CVIs out of range, especially LC or DC, means the sensor was right and you have a mechanical problem to price.

5. Then, and only then, go after the sensor itself

The ISS lives on top of the case, which is the good news and the bad news. It is reachable, so people replace it early and often. Chrysler's 2009 62TE service information describes it as a two-wire magnetic pickup that generates an AC signal as the input clutch hub turns, bolted to the case and sealed with an O-ring (source 7). That means a meter check tells you the coil is intact, not that the signal is clean; the graph is what matters. Before you do:

• Inspect the tip. Ferrous debris packed on the magnet is the classic non-electrical cause of an implausible signal. A fuzzy tip on a unit with dark fluid is telling you where the metal came from, and that is a bigger conversation than a sensor.
• Back-probe and wiggle. Do it with the graph running. If the trace glitches when you move the harness, you found it, and you did not need a new sensor.
• Check the connector and the seal. Fluid wicking up a harness into a connector is common on high-mileage units and produces exactly this kind of intermittent.
• Tag the sensors as they come out. Three sensors on one case, two of them at the rear, and they are easy to swap by accident on reassembly. A crossed TSS and OSS produces a set of ratio codes that will make no sense at all.
• Clear and verify. A rationality code needs a completed drive cycle through the affected range to confirm the repair. Do not hand it back on a cleared code alone.

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The Two Repairs This Code Actually Ends In

Strip away the noise and P0716 on a 62TE resolves one of two ways.

Electrical. The sensor, its connector, its ground, or debris on the tip. Fix it, clear the code, drive the range where it set, and confirm the ISS tracks engine RPM with the converter clutch applied and produces a sane ISS-to-TSS ratio in every gear. This is the outcome you want and it is a same-day job.

Mechanical. The sensor was accurate and a clutch is passing. Here the code is a symptom, and replacing the sensor buys a few days of quiet before the customer comes back less patient than before. The CVI check is what separates the two, which is why it belongs in the diagnosis and not after the parts order.

There is a third outcome worth naming because it wastes the most time: a P0716 that is really a fluid level problem, already documented by FCA in bulletin 21-046-15. It is the fastest thing on the list to rule out and the one most often skipped.

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Keeping It From Coming Back

• Get the fluid level right and keep it right. ATF+4 to MS-9602, 5.5 quarts on a service and 9.0 after an internal repair, checked with the temperature verified on the scan tool. A 62TE that runs low does not fail politely.
• Do not reuse a swollen sensor O-ring. A weeping sensor bore both loses fluid and lets the connector fill. Torque the speed sensor bolts to 12 N.m (105 in. lbs.) per the Chrysler service information (source 7); they thread into aluminum.
• Route and secure the harness the way it came. Rubbed insulation against a case rib produces an intermittent that will look exactly like a failing sensor for months.
• If you found metal on the tip, find out where it came from. The ISS is a magnet hanging in the fluid stream. It is the cheapest debris detector on the vehicle, and it is worth reading rather than just wiping off.

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Shop the Part for This Fix

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FAQ

What does P0716 mean on a Chrysler 62TE?

ATRA's 62TE code list defines P0716 as Input Speed Sensor 1 Circuit Performance. Performance means the signal is present but the controller does not believe it. The reading drops out, goes noisy, or stops agreeing with engine speed and the other two speed sensors. That is different from an open or shorted circuit, which sets a circuit code instead, and it is why a resistance check across the sensor often passes while the code keeps coming back.

How many speed sensors does a 62TE have?

Three. Per ATRA, the input speed sensor sits on top of the case and reads turbine speed off the input shaft. The transfer speed sensor is the old 40/41TE output sensor relocated to the back of the case, and it reads the front annulus and rear carrier assembly. The output speed sensor is unique to the 62TE and reads the underdrive compounder output carrier. The controller runs its ratio math in two stages across those three signals.

Does P0716 on a 62TE always mean a bad sensor?

No. The sensor reports what it sees. If a clutch is slipping, input speed genuinely does not match the commanded ratio and the controller flags the sensor that reported it. Check the fluid level and condition, check for a shared speed sensor ground fault, and compare clutch volume index values against spec before condemning the sensor. Replacing a good sensor is the most common wasted repair on this code.

Can low fluid set P0716 on a 62TE?

It can contribute. A low 62TE aerates the pump feed, line pressure falls off, and clutches release under load, which throws the ratio math off and drags speed sensor rationality codes in with it. FCA bulletin 21-046-15 covers exactly this on 2015 Grand Caravan and Town and Country units, where a low fluid level alone produced harsh shifting under heavy acceleration. Correct the level with ATF+4 before chasing anything electrical.

What fluid and how much does a 62TE take?

ATF+4 to Chrysler material standard MS-9602, and nothing else. Per ATRA, a service fill is 5.5 quarts, about 5.2 liters, and a fill after an internal repair is 9.0 quarts, about 8.5 liters. Check the level on level ground with the transmission temperature verified on a scan tool, using Miller tool 9336 or an equivalent wire stick, because there is no conventional dipstick tube on most of these.