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P1652

Powertrain Induced Chassis Pitch Output Circuit.

  • Chevrolet
  • Powertrain
  • Manufacturer code
  • Low severity

How this code is built

P
SystemPowertrain
1
Defined byThe manufacturer
6
AreaComputer and output circuits
52
FaultThe specific fault in that area

What it means

On Chevrolet, P1652 means the powertrain control module has found a fault in the Powertrain Induced Chassis Pitch output circuit. This is a signal the PCM sends to a chassis or ride control module so it can anticipate body pitch caused by torque changes. The PCM set the code because the circuit voltage or signal did not match what it was commanding. Whether it is fitted and how it is wired depends on the model and year.

Symptoms

  • Check engine or service vehicle soon light on
  • Ride control or suspension warning message on some models
  • Ride feels harsher or less well controlled under hard acceleration or braking
  • Noticeable body pitch or dive during sharp throttle changes
  • No obvious driveability change in many cases

Possible causes

  • Damaged, chafed or corroded wiring in the pitch signal output circuit (open, short to ground or short to voltage)likely
  • Poor connection or corroded terminals at the PCM or the chassis or ride control module connectorlikely
  • Fault in the receiving chassis or ride control modulepossible
  • Internal output driver fault in the PCMpossible
  • Low battery voltage or poor earth causing an incorrect signalpossible
  • Outdated PCM or chassis module software where a manufacturer bulletin appliesrare

How to diagnose

  1. Read all stored codes and freeze frame data, and note whether any chassis, ride control or other communication codes are present alongside P1652.
  2. Check for relevant technical service bulletins for the specific model and year, as the circuit and module layout vary.
  3. Visually inspect the wiring harness between the PCM and the chassis or ride control module for chafing, heat damage, water ingress or previous repairs.
  4. Inspect and clean the connectors at both ends, checking for bent, pushed-back or corroded pins.
  5. Check battery condition, charging voltage and main earth connections.
  6. Using the wiring diagram for the vehicle, test the signal circuit for continuity, short to ground and short to voltage with the modules disconnected.
  7. Clear the code and road test, monitoring the signal and whether the code returns.
  8. If the wiring is sound, check the receiving module and PCM operation and software level against the manufacturer's information.

How to fix

  • Repair or replace damaged wiring in the pitch signal circuit.
  • Clean or replace corroded or damaged connectors and terminals.
  • Restore good battery condition and repair any faulty earths.
  • Replace the faulty chassis or ride control module if testing shows it is at fault, and programme it as required.
  • Replace the PCM only once wiring and the receiving module are proven good, and programme it as required.
  • Update PCM or chassis module software if a known issue is documented for that vehicle.

Can I keep driving?

Low severity

The car can normally be driven as the fault mainly affects ride refinement, though handling may feel slightly different under hard acceleration or braking. Book it in for diagnosis soon, especially if a ride control warning is showing.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.

This code for other makes

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